NEW YORK (AP) -- Global stock markets are down sharply on tensions over Russia's military advance into Ukraine and the threat of sanctions by Western governments.

U.S. stocks followed declines on European exchanges early Monday. The Dow Jones industrial average dropped 143 points, or 0.9 percent, to 16,178 shortly after the U.S. stock market opened. The Standard & Poor's 500 index fell 14 points, or 0.8 percent, to 1,844 and the Nasdaq skidded 47 points, or 1 percent, at 4,260.